Dipping mechanism.



W KWHIGHAMQ DIPPING MECHANISM. APPLICATION r| .0 SEPT.23. m5.

' Patented Dec. 4,191?

INVENTOH and arrangements of parts, as hereinafter WILLIAM wnrerrnn, orrrr'rsnnnori, rnnnsrnvenra,

brain narrates;

DIPPING MECHANISM.

Specification of Letters Patent.

Application filed September 23,1915. Serial No. 52,192.

To all whomit may concern.

.lBe-it known. that l, VILLIAM VVI-IIGHAM, a citizen of the UnitedStates, and resident of Pittsburgh, in the county of Allegheny and Stateof Pennsylvania, have invented certain new and useful Improvements inDipping Mechanism, of which the following is a specification.

My invention relatesto means employed in handling glass articles, indipping such articles into an etching solution, lacquer, or otherliquid, and while not restricted to such use, more particularly indipping electric light bulbs into a solution of hydrofluoric acid orsimilar etching compound or solution, and in holding the articles in thesolution while etching the outer surface of the glass. a U

Heretofore, it has been-the practice to dip such articles by hand, andas the articles must be maintained in the. fluid for a short time, thehand dipping operation is slow and expensive, while it has been founddifficult if not impossible to dip the successivelamp bulbs into thesolution to a uniform depth and to maintain the lamps in a vertical position while being dipped. j

The specific gravity of the etching solutions or compounds is usually sogreat, relative to the articles being dipped, as to make it necessary tohold the articles in position within the solution and prevent theirlifting therefrom while the solution or compound is acting upon thesurface of the article being etched or coated. i i

One ,ob'ect ofmy invention is to provide dipping apparatus. havingnovelv means whereby the articles are dippedsuccessively into theetchingsolution to a pre-determined depth .and are heldtherein for any desiredtime interval. a

. Another object of the invention is to provide .a dipping apparatushaving novel means whereby the articles are maintained in a, verticalposition while being manipulated inthedipping operations, and where bythe depth to which the successive lamps are dipped is madeuniform. i j aj j [The invention-consists in certain novel features of construction,and combinations will bemore fully described and, specifically pointedout in the appended claims.

Referring now to the drawings forming part of this specification, Figure1 isan ele vation partly in; section showing a v dipping mechanismconstructed and arranged and Patented neeaiiv adapted for use .indipping incandescent lamp bulbs in accordance with my invention inetching such glass articles. to impartthe desired frosted appearance tothe surfacesof the articles.

Fig. 2 is a plan of the apparatus show in Fig. 1. a j V Fig. 3 is asectional end elevation showing a modified form of apparatus asconstructed and arranged. for dipping larger articles of differentcontour.

Fig. 4% is a side elevation showing a detail of the lamp centeringmechanism shown in Fig. 1.

In the accompanying drawings nu meral 2 designates a base which .may bethe top of a table or bench, or which (as shown) may be made of suchsize asto be readily placed in any desiredlocation upon a table orbench. extend vertically, is a hollow stem 1 or pedestal 3,-andremovably secured within the opening 4 of the pedestal so as to be.adjustable relative thereto is the long end 5 of a bent arm or gooseneck 6.

ecured on the base 2 so. as to .The upper end of the pedestal 3 isprovided with a thumb screw 7 or equivalent device, by which the gooseneck 6 is secured in adjusted positionon the pedestal, so as to preventlifting movement thereof and also a to secure it against rotation aboutthe axis of the pedestal. i i

An adjustable ring or collar 8 which is slidably mounted on one end ofthe goose thereon by a thumb screw 9, provides means for limitingdownward movement of the goose neck relative to the pedestal 3and inthis way to regulate the distance the succesneck 6 and is secured inadjusted position sive lamp bulbs l0 suspended from the short 1 end 11of the goose neck are dipped into the etching solution within. thecontainer 12 in using my improved apparatus.

The upper surface of the base 2 has a counterbored recess or hole 13forming a rabbet in which the container-or receptacle 12 for the etchingsolution, lacquer or other liquid into which the lamp bulbs or otherarticles are dipped, ispositioned, the container 12 in this waybeingpositioned relative tothe pedestal 3 so as to bring the successivelamps or other articles suspended from the goose neck 6 substantiallyinto alinement with the center, of the con tainer 12. V

' whende'siredl The container also may be permanently fastened to. thepedestal, al-

thouglr preferably th'e'container willbe removably" secured as has beendescribed.

Secured to the short end 11 of the bent arm'orgoose neckt'isasocke't, aclamp or other means, 16 for detachably securing. nd h l ing' the lampbulbs 10 brother articles irr'dippihgposition above the "container 12.As shown the socket "16 has internal threads 17 to fit the threads onthe base '18 on the ordinary inca'ndescent lamp bulbs 10;

As the bases-'on'such incandescent lamps seldom are in axial alinementwith the center of the glass bulbs to which they "are permanentlyfastenedyto simply screw the base v 18 ofthe lampsiintothe socket 16will resnl't 1n irregulamty'and fvaria'tio'ns in the depth 'to "whichthe bulbs project into the solution in the container, s that thesuccessivela'mps are not etched' 'injthfe desired uniformmanner.'

Toavoid 'thisdifii'cul'ty the socket 163 is provided with anjannularsleeve 19'which is arranged to, slide "on the socket to bring, itsl'o'v'verend in'toiengagement with the surface ofthe neck portion '20offt he lamps '10 so as to center the successive lamps "by engage: mentof the end of the sleeve 19. with the lamp necks 20 and. in this waysecure thesuccess'ive lamps-on the goose neck so as togextend in thedesired vertical plane.

The sleeve 19 may be rev-iced at separated intervals on its, surfacewith a series ofslits 22,22, so as to enable the sleeve to befrictionally 'heldin 'po'si'tion on the socket 16, 'or'a-set screw .23may be used to fasten the sleeve in adjusted position on the socket andbothinay be'e'l-flpl'o'yed when desired.

In the modification shown in Fig; 3, the construction is the same except"that, the clamp 24 on the short end 11 of the goose neck used insecuring the articles to be etched or lacquered on theendof the gooseneck 6 is somewhat different, a thumb screw 25 be ijr'rg.em-ployedftr ihold the article in vertical fpo'sitio'nfbetween the jaws 26 -andj2f7,and as the shape and size of the various articles etched or la queredwill differ from that of theincandes'cent lamp bulbs 10,the container 12used with this apparatus is of increased lengthand depth and in suchcase the recess 1 3 in the upper face or the base '2 will be made or thesame size and contour as the outer side surface of the container, whilea Both "the recess and the neasnec c spring .clasp 15 will be used withor as a substitute for the recess 13, as is desired.

In the operation of my improved apparatus, two or more goose necks 6will be used with each pedestal 3 and container 12, one being employedto hold an article 10 being etched in dipped position within the liquid,While 'anetchcd "article on the other goose neck is being freed ofexcess solution and while the. etched article is being removed and beingreplaced onth'e gooseineck byan unetched' article. 7

After the lamp 10 or other article is screwed part way into the socket16'onthe short end 11 of the goose neck, thcslcerc 1'9is moved'on thesocketto bring its lower edge, into engagement with thesurfacc of thelamp 10. The longend 5 of the goose neck 6 is-then insertedin thevertical opening 1in the hollow pedestal; Theopcning 4- in the pedestalforms a guide'so that the goose neck moves vertically 'in a straightlino and the lamp attachedtothe socket'onth'c short end 11 of the gooseneck is moved down wardly into the'liquid in the'containor 12 in avertical line. The lamp is submcrgcdwitlr in the solution in thecontainer 12 to the dcsired'depth and *the thumb screw 7 on theupperend'of the pedestal3 is thcn'tightencd to fasten the goose neck inposition to hold the lamp in the desired iposition. The set collar 8 onthe end 5 of the goose neck is then. moved downwardly thereon until in.engagement with theupper'end of the pedestal 3 and the thumb screw '9is. then tightened to, fasten the set 'colla'r in such position on thegoose neck 6.

After the lamp, has been held in the solution for the desiredtimeinterval, the thumb screw 7 on the pedestal is turned to release thegoose neck and the goose neck is lifted to raise the now etched lampbulb out of the solution and to remove the goose neck 6 from the openingin the pedestal 8.

A second 'gooseneck 6 is then positioned in the same manner as has beendescribed, and while the lamp on the short endof this goose neck is heldin the etching solution, any excess solution adhering to the lirs'tetched lamp. bulb is scraped off thesurfacc of such lamp, after whichthe lamp bulb is removed from the goose neck, and washed, and a new lampbulb is placed in position on thesocket'of this 'gooseneck. The secondgoose neck is then removed from the pedestal as has been described, thegoose, neck having the unetched lamp then being placed in position onthe pedestal 3, and as the set collar 9 engages with the upper end ofthe pedestal the depth to which this 'lampfis caused to extend into thesolution is determined by the set "collar 10', being thesame as with theothers.

Experience has shown that in etching lamps with a solution ofhydrofluoric acid and allowed to drip back into the container.

In the operation ofthe apparatus shown in Figs, 3 and 4 the steps willbe the same as has been described.

The advantages of my invention will be apparent to those skilled in theart. The goose neck forms a convenient means for handling the lamps andby the use of the apparatus described the successively etched lamps areimmersed in the etching solution to exactly the same depth so'as toprovide a uniformly dipped product. The goose neck and pedestal formguiding means by which the lamp is moved into the solution in a verticalline and the set screw on the pedestal enables the successive lamps tobe fastened in submerged position so that the buoyancy of the electriclight lamp will not cause it to lift out of the solution, as wouldotherwise be the case.

Modifications in the construction and arrangement of the parts may bemade Without departing from my invention as defined in the appendedclaims.

I claim c 1. Dipping mechanism comprising a liquid containing vessel, avertically slidable goose neck having means on one end for suspendingarticles above said vessel, and means for holding the slidable gooseneck in position relative to said vessel.

2. Dipping mechanism comprising a liquid containing vessel, a verticallyslidable goose neck having means on one end for suspending articlesabove said vessel, a pedestal con nec'ted to said vessel on which saidgoose neck is slidably mounted, and means for fastening the goose neckin position on said pedestal.

3. Dipping mechanism comprising a liquid containing vessel, a verticallyslidable goose neck having means on one end for suspending articlesabove said vessel, a pedestal connected to said vessel on which saidgoose neck is slidably mounted, means for fastening the goose neck inposition on said pedestal, and adjustable means on said goose neckengaging with the pedestal for limiting the downward movement of thevertically slidable goose neck.

l. Dipping mechanism comprising a base, a liquid containing vesselthereon, spring means for yieldingly connecting said vessel to saidbase, a vertically movable goose neck having one end adjustably securedto said base, means on the other end of said goose neck for suspendingarticles above said vessol, means for fastening the goose neck inadjusted position on said base, "and means adjustably secured on saidgoose neck and arranged to'engage with said base for limiting thevertically downward movement of said goose neck.

5. Dipping mechanism comprising a liquid containing vessel, a verticallymovable goose neck having one end slidably mounted on the vessel, meanson the other end of said goose neck for suspending articles above saidvessel, means for fastening the goose neck in adjusted position on saidvessel, and means'on said other end of the goose neck for aliningvertically the articles suspended from said goose neck.

In testimony whereof I have hereunto set my hand.

wnmian wi-nen.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner at Patents, Washington, D. 0.

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